Cooling with s340 case

[electrospective]

I have an s340 case with a kraken x52. How would i set up the fans for maximum coolness and airflow. I currently have the top fan on intake and the back fan and output. the two in the front covered by the radiator is i think out outake its blowing hot air out the front. I realized i set this up wrong how would i ensure maximum airflow and coolness correctly?

 

[Aeacus]

Since hot air rises, case's airflow rule of thumb is: front & bottom - intake; top & rear - exhaust.

In other words:
rad at the front (only place where you can put it)
front - 2x 120mm rad fans as intake
top - 1x 120/140mm fan as exhaust
rear - 1x 120mm fan as exhaust

This is the best you can do in this otherwise poor airflow handicapped case. Only 4x fan mount locations and solid front panel is the ones that make it poor airflow wise.